194281987620 has 96 divisors (see below), whose sum is σ = 648732930048. Its totient is φ = 42476556672.

The previous prime is 194281987619. The next prime is 194281987657. The reversal of 194281987620 is 26789182491.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10046344 + ... + 10065663.

It is an arithmetic number, because the mean of its divisors is an integer number (6757634688).

Almost surely, 2^194281987620 is an apocalyptic number.

194281987620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194281987620 is an abundant number, since it is smaller than the sum of its proper divisors (454450942428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194281987620 is a wasteful number, since it uses less digits than its factorization.

194281987620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112049 (or 20112047 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 57.

The spelling of 194281987620 in words is "one hundred ninety-four billion, two hundred eighty-one million, nine hundred eighty-seven thousand, six hundred twenty".